Major Description
When uploading a huge file some seconds nothing happens on the UI. During this time the upload button is still enabled and could be pressed a second or third time. After some seconds the UI changes and the upload bar appears. Here the upload button is disabled.
When uploading a video I see on server side the ffmpeg converter running for each time I pressed the button. The file appears in the file folder more than once too.
Expected behaviour:
When the upload button is pressed it's disabled immediatly.
A seconds upload should be blocked.